I agree with being thoughtful whether to fate grind or not.

people will say that, it's what they've done in the past, but their isn't always the people when you start out again

5 tips if you do
to get a gold in most FATEs, you only need to participate in it's objective for ~2 minutes
Healing capable chocobo's will aid you a lot if you're solo or lacking fate players
if you're a healer class, you can participate in any fate by healing others PC or/NPC, sometimes even one cure gets you a gold
Joining fate parties Aren't faster for single mob fates (like NMs) but you get a fair amount of xp if your party claims multiple mob fates
Don't be afraid to switch to Class instead of job, if you find yourself soloing. jobs are mostly for party roling
Over all there are many and since 2.2 newer ways to get XP (challenge log unlock quest in limsa)